Apparatus for the production of artistic prints and impressions



July 28, 1925.

. J. GRUNBERG APPARATUSFQR THE PRODUCTION OF ARTISTIC PRINTS AND IMPRESSIONS 2 'shuwsnet 1 Fi led March 25. 1925 32 M M H July 28, 1925. H

- J. GRUNBERG APPARATUS FOR THE PRODUCTION OF ARTISTIC PRINTS AND mrmgs xons Patented July 28, 1925.

- UNI'TEDSTVATES Jose? enunnnne, or BERLIN, GERMANY. 1

APPARATUS FOR THE IRRODUGTION OF ARTISTIC PRINTS AND 1M PRESSIONS.

v A neation filed March 23, 1925'. 1 Serial No. 1 7,810.

To all whom it may concern.

Be it known that I, Josnr GRtiNisnRe,

formerly a citizen of Russia, and at present having no status as a citizen: of any country, and residing at Berlin,Germany, have invented certain new and useful Improvements in Apparatus for the .Produc-,

tion of Artistic Prints and Impressions, of

which the following is a specification.

My invention relates to'an apparatus for the production of artistic prints and impres- .sions Y Pressure processes hitherto used 1n the A graphic arts have the disadvantage that the originah'fwhether it be a copper form, a lithographic stone or a wood block, from.

,which the prints are prepared'quickly becomes useless, Hence most valuable original works. are lost, only the first few prints being ood, while the remaining prints fail to s ow all the beauties of the original.

This is because the hard press plate or roller;

under the high pressure of the press wears away or flattens the finest parts of the original after a short time, so that .the drawing,

I becomes blurred. It also frequently hap- A further disadvantage to in that for engravings, lithographs and;

tilting, or the like 'ves the drawing difierent strength. indi erent faultycopy is produced.

i has existed hitherwood cuts a special press .was necessary.

for each; moreover, the processes apart'from the above mentioned disadvantages 'werevery elaborateand expensive.

The disadvantages mentloned are eradi- 'cated by the apparatus'according-to this invention and moreover a pressis provided which may be used for all kinds of printing.

According to my invention the yielding material: or object to be pressed or printed upon and the original piece (press block,..

lies 'upon the 'membrane d closing the constone, or the like) consisting of unyielding material ar pressed against one another by r the movement of .one or more elastic walls compressed-air directly tothe rear side of I the material to'be pressed. In this known arrangement however the. material to. be

pressed must be sealed to the open air cylin-' d l wh r by a damaging tension and Waste thematerial to be pressed lies places, whereby a process into effect the material to be pressed must. form a part of the pressure device. I

This disadvantage is overcome by the apparatus according to my invention in which n quite freely upon theoriginal plate.

The apparatus according to invention also gives theradvantage that for the origi-' nal plate materials such 'as-glass, porcelain and so forth can be used,f'which could not be used previously owing totheir brittleness, but which are particularly suitable for i'inework.

In consequence of the elasticsteady pres- The accompanying drawings illustrate in Figs. 1 and 2 severalfarrangementswhereby .the invention may be carried into effect. pens that the press pressure of the rigid: plate or roller in consequence-of warping,

Fig." 3 shows one form Ofbonstruction of a press accordlng to my mventmn, 1n vertion line .II of Fig, 3. iFig'.i5 shows in vertical section a second example .of, this kind of press, and-Fig. 6;sho w's a further example also in vertical section.

which is closed on its lower side by a membrane d. 3 If. now the container 0 is filled with compressed air or liquid the membrane d is bulged out and presses the leaf lying on the original piece quite evenly thereagainstw p Y According to Fig. 2, the original'piece a tainer 0. Abovethe original piece is situateda second container 6, which is closed on its low er' 'sideiby a membrane The upper container is nowffilled with a liquid 7o 7 sure obtained all. parts; of the. picture are ;cal section. v Fig. 4: is a'horizontal section and remains atabout atmospheric pressure.

The lowercontainer 0 is at the same time inflated with air or liquid under pressure, whereby the leaf lyingupon the piece a is pressed against $1. upper membrane f in of the container p1ate'5, and aplate'? serves for tightly sealports=2, wh-ich-carrythe upper and lower press portions. 'The upper portion consists of a cylindrical hood 3 with fluid leads 14 and pressure gauge 15. The lower opening 3 is covered by' a rubber ing this plate 5 against the inwardly 'pro- "jecting lower rim 4 dfthe container3. 'The plate? is suspendedlfrom a screw spindle 8 which can be screwed within a fixed nut "Qcarried by a bridge 10. The adjustment of the .screw spindle 8 and therewith the plate 7 is "effected by means of a key which may be inserted inan opening 12 provided with a closing. cap 11. 7 downthe spindleSfthe outer rim ofplate'7, which can'move" freely upon the neck 13of Upon screwing the spindle 8, is pressed tightly against the underlying rim, 4:. The outer rim surface otthe plate"? can also be conical "'interiorly v so thatit presses intothe rubber'pl'ate' with a wedge like action.

"The'eont'ainerfi is carried bythe bosses 16 upon'the supports"2,:upon which itis verti- ,cally adjustable. I

The" lower portion consists chiefly of a .press table 17 upon which lies the original" piece or'matricel 8. 'The'table '17- is provided withjfour supporting wheels 19 whichrest on runningrails 2O 'carried'by the :ver- "'ticalsuppo'rts 2. 1

I "'Aftertheirubbeu late "5 has beenflpressed .up'on byfthelplate a liquid, for example :oil :orWaLter; is introducedi'nto the container and placed underpressure. "table 17 with .the original piece .1 8 lying thereon andthe leaf "to be pressed placed' upon this is previouslyzraised means of a lifting spindle 21'," which is rotated the "hand-wheehQQ, "just so .high that the origv The press inal'piecel'8withthe leatto'begpresse'd rests "againsttherubber'pl'ate The supporting r'tainer 3' "and ensure correct positioning of thetable for an directions.

' with an "electrical device for indicating adefinlte' pressure.

Afterprinting thecopy thetable 17 is again lowered till' the supporting wheels 3 19 rest ntherails 20. On; the l'atter'the atmospheric "pressure.

table 17' is drawn out of the press and a new copy prepared. The backward movement of'lthetable '17 is limited bytthemear guiding rails 23 which reach down almost to the running rail-s20.

With original-pieces of easily broken ma terial it is preferable to make the underlying base of the original piece :elastio also. Fig. 5 illustrates such a press. The press table 17 present-s a hollow chamber 24 which is covered by an elastic .membrane,

for example a rubber plate'255 upon'which lies'the original piece l8. On'the rim of the rubber plate .25 lies a ring 26 which is guided vertically by means of pins 127 or in other suitable manner upon the'presstalo'le '17 in orderto be able to press the rubber plate 25' firmly against the table top. "The hollow-chamber 24 is -filled with liquid through an 'opening-which is closed "by meansof a' plug'28 andfis at about normal Ifthe' co'ntainef'fi is filled with liquidunder pressure it presses the rubber plate '5: not only against the original piece 18 butalso 'against the' ring:26 whereby the hollow chamber 24 is sealed;

The adjustment and *joperation of; the

press in 'Fi 5is'substantiallyFthe same as for thepress shown in Figsf'3'and 4'.

' Upon using the press'accorthng to'my 1nvention it is'important to havehermetic'ally sealed not only' the pressure container B by 'means of'the-membrane ti', buta'lso in example shown in Fig; 5- theifluid' chamber 24 by means of the inernlorane2 5. Forthis, purpose plate 7"WhlCh presses uponthe outer .rim of the-'me1nbrane'5 is so arranged upon the neck"13 of the screw-spindle 8"that upon bulgingout and "thinning of the iinembrane '5 underpressure the plate -7 canslide under the action of the pressure" thereon,

so that the sealing is completely'maintained. 'fFor--'the' same reason the ring 26 which lies upon the 11111 01 the membrane 25 underpressure 'of the" upper membrane 5 completely 'fol-lows 'the yie lding'o'f the membrane"25.

With the presses accordingf'tol Fi*gs. 35

' *the' work piece (paper sheet or 'li'ke) cannot wheels '19 slide in vertical guides "23 which are secured on the "underside ofth'e'conbe *greater than the space enclosed day the flange 4 on thegpressure container 3, "because the :work piece must be' 'driven"within-the of elastic material, such as'rubberrand is so thick. that "its outersur face; which con- 'stitutes the "actual "pressure surface, lies adj a'cent: the outer edge of the projecting rim *Thepressureplane-then lies no longer within, but without'the*fiange'l. The reinforcement can be integral with the rubber plate5, *It'may bepreferabla as'the rubber bination, a ta plate 6 consists of relatively thin material, to attach one or more rubber layers or canvas insertion pieces to the rubber plate 5.

The reinforcement 5 has moreover the advantage that the plate 5 bulges only a very little in use and therefore is not subjected to heavy demands, its serviceable life being very long.

I claim:

1. Apparatus for production of artistic prints and impressions, comprising in combination,'a table for carrying the original piece and the material'to be pressed, a pressure container open at one side, an inward ly pro ect1ng mm at the open side of sa1d brane adapted to close the open side of said container, said table being formed as a container open at its upper slde, a second membrane arranged to close the open side of said table and to support the original piece and the material to be pressed, a ring vertically movable and being arranged to hold said membrane in position, means for producing hydraulic or pneumatic pressure in the first container and thereby pressing the first membrane against the material to be pressed and against said ring.

3. Apparatus for production of artistic prints and impressions, comprising in combination, a table for carrying the original piece and the material to be pressed, a pres-' sure container open at one side, a membrane adapted to close the open side of said container, a ring for tightly sealing the rim of said membrane against its seat, said ring being arranged to slide along a guide, said table being formed as a container open at its upper side, a. second membrane arranged to close the open side of said table and to support the original piece and the material to be pressed, a ring vertically movable and arranged to hold said membrane in position, means for producing hydraulic or pneumatic pressure in the'first container and thereby pressing the first membrane against the material tobe pressed and against said ring, means for raising and lowering said table, and means for holding said table in printing position. 1

In testimony whereof I have affixed my signature in presence of two witnesses.

VVitnesse s:

, ULAD ENDEY, VROY Fox.

JOSEF GRUNBERG. 

